Tools & Wizards About Us
knvvl.nl screenshot

Report Summary

  • 58

    Performance

    Renders faster than
    75% of other websites

  • 86

    Accessibility

    Visual factors better than
    that of 63% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 93

    SEO

    Google-friendlier than
    84% of websites

knvvl.nl

KNVvL | Vlieg mee!

Page Load Speed

9.8 sec in total

First Response

3.3 sec

Resources Loaded

6 sec

Page Rendered

411 ms

knvvl.nl screenshot

About Website

Visit knvvl.nl now to see the best up-to-date KNVvL content for Netherlands and also check out these interesting facts you probably never knew about knvvl.nl

KNVvL, de Koninklijke Nederlandse Vereniging voor Luchtvaart. Voor sportieve en recreatieve luchtsporters en liefhebbers van de lichte luchtvaart. Wij maken het mogelijk dat jij zorgeloos kan vliegen!

Visit knvvl.nl

Key Findings

We analyzed Knvvl.nl page load time and found that the first response time was 3.3 sec and then it took 6.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

knvvl.nl performance score

58

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.6 s

32/100

10%

LCP (Largest Contentful Paint)

Value5.7 s

16/100

25%

SI (Speed Index)

Value6.0 s

47/100

10%

TBT (Total Blocking Time)

Value50 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.216

58/100

15%

TTI (Time to Interactive)

Value5.3 s

73/100

10%

Network Requests Diagram

knvvl.nl

3325 ms

mootools-core-1.4.5-full-compat-yc.js

449 ms

mootools-more-1.4.0.2.js

561 ms

swfobject.js

278 ms

Site.js

180 ms

Our browser made a total of 173 requests to load all elements on the main page. We found that 46% of them (80 requests) were addressed to the original Knvvl.nl, 12% (20 requests) were made to Static.xx.fbcdn.net and 10% (17 requests) were made to Maps.googleapis.com. The less responsive or slowest element that took the longest time to load (3.3 sec) belongs to the original domain Knvvl.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 2.0 MB (39%)

Content Size

5.2 MB

After Optimization

3.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Knvvl.nl main page is 5.2 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 2.9 MB which makes up the majority of the site volume.

HTML Optimization

-93%

Potential reduce by 1.2 MB

  • Original 1.3 MB
  • After minification 1.3 MB
  • After compression 94.2 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 1.2 MB or 93% of the original size.

Image Optimization

-3%

Potential reduce by 85.4 kB

  • Original 2.9 MB
  • After minification 2.8 MB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. KNVvL images are well optimized though.

JavaScript Optimization

-70%

Potential reduce by 671.6 kB

  • Original 961.7 kB
  • After minification 883.7 kB
  • After compression 290.1 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 671.6 kB or 70% of the original size.

CSS Optimization

-83%

Potential reduce by 50.1 kB

  • Original 60.3 kB
  • After minification 52.5 kB
  • After compression 10.2 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Knvvl.nl needs all CSS files to be minified and compressed as it can save up to 50.1 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 63 (38%)

Requests Now

168

After Optimization

105

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 168 CSS, Javascripts, AJAX and image requests in order to completely render the main page of KNVvL. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 37 to 1 for JavaScripts and from 12 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

knvvl.nl

knvvl.nl

3325 ms

mootools-core-1.4.5-full-compat-yc.js

mootools-core-1.4.5-full-compat-yc.js

449 ms

mootools-more-1.4.0.2.js

mootools-more-1.4.0.2.js

561 ms

swfobject.js

swfobject.js

278 ms

Site.js

Site.js

180 ms

FormSubmit.js

FormSubmit.js

211 ms

site.css

site.css

267 ms

datepicker.css

datepicker.css

299 ms

lightface.css

lightface.css

356 ms

js

js

26 ms

milkbox.css

milkbox.css

362 ms

milkbox-yc.js

milkbox-yc.js

470 ms

all.js

all.js

253 ms

ga.js

ga.js

56 ms

siteBackground.jpg

siteBackground.jpg

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spacer.gif

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twitter.png

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facebook.png

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240 ms

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issuu.png

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240 ms

knvvlLogo.png

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246 ms

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1223 ms

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1225 ms

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__utm.gif

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162 ms

widgets.js

widgets.js

162 ms

common.js

common.js

103 ms

map.js

map.js

103 ms

util.js

util.js

103 ms

marker.js

marker.js

103 ms

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1440 ms

likebox.php

likebox.php

447 ms

9318.gif

9318.gif

1448 ms

StaticMapService.GetMapImage

StaticMapService.GetMapImage

144 ms

onion.js

onion.js

78 ms

openhand_8_8.cur

openhand_8_8.cur

95 ms

timeline.d11f7a3b3287fb94220e8ee6d03cc772.js

timeline.d11f7a3b3287fb94220e8ee6d03cc772.js

294 ms

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1323 ms

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1407 ms

ViewportInfoService.GetViewportInfo

ViewportInfoService.GetViewportInfo

91 ms

stats.js

stats.js

23 ms

controls.js

controls.js

23 ms

infowindow.js

infowindow.js

23 ms

271 ms

xd_arbiter.php

xd_arbiter.php

236 ms

xd_arbiter.php

xd_arbiter.php

369 ms

transparent.png

transparent.png

64 ms

css

css

60 ms

blue-dot.png

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49 ms

google4.png

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123 ms

vt

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120 ms

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120 ms

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121 ms

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121 ms

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120 ms

zN7GBFwfMP4uA6AR0HCoLQ.ttf

zN7GBFwfMP4uA6AR0HCoLQ.ttf

114 ms

RxZJdnzeo3R5zSexge8UUaCWcynf_cDxXwCLxiixG1c.ttf

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114 ms

Hgo13k-tfSpn0qi1SFdUfaCWcynf_cDxXwCLxiixG1c.ttf

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115 ms

d-6IYplOFocCacKzxwXSOKCWcynf_cDxXwCLxiixG1c.ttf

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118 ms

9103.jpg

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1147 ms

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1181 ms

410ucuAGgaJ.css

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185 ms

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228 ms

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269 ms

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404 ms

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521 ms

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316 ms

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316 ms

OloiM1PZafe.js

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314 ms

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548 ms

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507 ms

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506 ms

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506 ms

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590 ms

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604 ms

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602 ms

syndication

syndication

82 ms

428475562248511488

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243 ms

AuthenticationService.Authenticate

AuthenticationService.Authenticate

132 ms

9330.jpg

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1188 ms

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1102 ms

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32 ms

timeline.47ab5d19e8ed22531abcf4f86f3ae53a.light.ltr.css

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96 ms

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999 ms

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312 ms

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441 ms

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441 ms

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445 ms

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445 ms

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430 ms

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776 ms

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810 ms

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768 ms

jot.html

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28 ms

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41 ms

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43 ms

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ping

100 ms

Accessibility Review

knvvl.nl accessibility score

86

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Links do not have a discernible name

Best Practices

knvvl.nl best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

knvvl.nl SEO score

93

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    NL

  • Language Claimed

    NL

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Knvvl.nl can be misinterpreted by Google and other search engines. Our service has detected that Dutch is used on the page, and it matches the claimed language. Our system also found out that Knvvl.nl main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

knvvl.nl

Open Graph description is not detected on the main page of KNVvL. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: